답안 #917786

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
917786	2024-01-28T19:25:19 Z	HaciyevAlik	Palindromic Partitions (CEOI17_palindromic)	C++14	100 / 100	102 ms	17396 KB

palindromic

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
const ll mod = 1e9+7,P=47,mx=1e6+5;
ll h[mx],p[mx];
string s;
bool check(ll a,ll b,ll l) {
	if(a>b) return false;
	ll h1=(h[a+l-1]-h[a-1]+mod)%mod;
	ll h2=(h[b+l-1]-h[b-1]+mod)%mod;
	return h1*p[b-a]%mod == h2;
}
void solve() {
	cin >> s;
	ll n=ll(s.size());
	for(ll i=1;i<=n;++i) {
		h[i]=(h[i-1]+(s[i-1]-'a'+1)*p[i-1])%mod;
		h[i]%=mod;
	}
	ll l=1,r=n,res=0;
	while(l<=r) {	
		ll k=1;
		while(!check(l,r-k+1,k)) {
			++k;
		}
		if(l==r-k+1) {
			++res;
			break;
		}
		l+=k,r-=k;
		res+=2;
	}
	cout << res;
}
int main() {
	ios::sync_with_stdio(false); cin.tie(0); cout.tie(0);
	p[0]=1;
	for(ll i=1;i<mx;++i) {
		p[i]=(p[i-1]*P)%mod;
	}
	ll t; cin >> t;
	while(t--) {
		solve();
		cout << '\n';
	}
	return 0;
}

Subtask #1

15.0 / 15.0

#	결과	실행 시간	메모리	Grader output
1	Correct	6 ms	8792 KB	Output is correct
2	Correct	6 ms	8796 KB	Output is correct
3	Correct	6 ms	8796 KB	Output is correct
4	Correct	6 ms	8840 KB	Output is correct
5	Correct	7 ms	8796 KB	Output is correct

Subtask #2

20.0 / 20.0

#	결과	실행 시간	메모리	Grader output
1	Correct	6 ms	8792 KB	Output is correct
2	Correct	6 ms	8796 KB	Output is correct
3	Correct	6 ms	8796 KB	Output is correct
4	Correct	6 ms	8840 KB	Output is correct
5	Correct	7 ms	8796 KB	Output is correct
6	Correct	6 ms	8796 KB	Output is correct
7	Correct	6 ms	8796 KB	Output is correct
8	Correct	6 ms	8840 KB	Output is correct
9	Correct	7 ms	8796 KB	Output is correct

Subtask #3

25.0 / 25.0

#	결과	실행 시간	메모리	Grader output
1	Correct	6 ms	8792 KB	Output is correct
2	Correct	6 ms	8796 KB	Output is correct
3	Correct	6 ms	8796 KB	Output is correct
4	Correct	6 ms	8840 KB	Output is correct
5	Correct	7 ms	8796 KB	Output is correct
6	Correct	6 ms	8796 KB	Output is correct
7	Correct	6 ms	8796 KB	Output is correct
8	Correct	6 ms	8840 KB	Output is correct
9	Correct	7 ms	8796 KB	Output is correct
10	Correct	7 ms	8796 KB	Output is correct
11	Correct	7 ms	8792 KB	Output is correct
12	Correct	7 ms	8792 KB	Output is correct
13	Correct	7 ms	8832 KB	Output is correct

Subtask #4

40.0 / 40.0

#	결과	실행 시간	메모리	Grader output
1	Correct	6 ms	8792 KB	Output is correct
2	Correct	6 ms	8796 KB	Output is correct
3	Correct	6 ms	8796 KB	Output is correct
4	Correct	6 ms	8840 KB	Output is correct
5	Correct	7 ms	8796 KB	Output is correct
6	Correct	6 ms	8796 KB	Output is correct
7	Correct	6 ms	8796 KB	Output is correct
8	Correct	6 ms	8840 KB	Output is correct
9	Correct	7 ms	8796 KB	Output is correct
10	Correct	7 ms	8796 KB	Output is correct
11	Correct	7 ms	8792 KB	Output is correct
12	Correct	7 ms	8792 KB	Output is correct
13	Correct	7 ms	8832 KB	Output is correct
14	Correct	102 ms	17396 KB	Output is correct
15	Correct	59 ms	17040 KB	Output is correct
16	Correct	90 ms	17136 KB	Output is correct
17	Correct	53 ms	13560 KB	Output is correct